Tamperproof valve



y 8, 1952 H. H. MOCHESNEY "2,602,629

TAMPERPROOF VALVE Filed May 22, 1948 k- \Hllllll Patented July 8, 1 952 --.assi gnor to The Welsb'ach1CorporationygBhila- I Vdelphia;.Ba.,a;corporation OIIDCIQWZHIBY' i p T I Application'May22, 1948, ser al fie. 28,5771

' 2 cases, (or 25155 1 l? This invention relates to a valvedevice for controlling theflow of fluids andis particularly useful in controlling the flow of fluids which involve hazards to health or'safety such as are involved gas especially in for example, in the handling of domestic installations.

The principal objects of the invention are to provide a valve which is absolutely tamper-proof so long as it is coupled in the' line; to provide a-valve the operating stem of I which can be packed at the factory soas tobe absolutely leakproof while at the samextime readily vandeasily operable to open or close the'same; to provide a construction 'in which all of the working parts are insertable either through one or the other of the fluid openings which the valve'controls so that they are completely inaccessible" to unauthorized persons once the valvehas been cou- Figure l; and

3 is asediolidn the; lined-310i Figure Figure 4 is a sebiih tithe line 44 of Figure 1. r

Referring to the drawing it will be 'seen' that myimproved valve comprises a housing or body 5 having an elongated central bore 6 at one end of which there is a threaded fluid opening I (in this instance the inlet opening) and at the opposite end of which there'is an aperture 8 throughwhich the operating stem 9 for the valve disc is adapted to project; The stem 9 may be turned in eitherdirection by any suitable type of handle ll fragmentarily shown as fitting around the squared end I2;

At a point intermediate the inlet opening I and the stem aperture 8 the body is provided with an internally threaded outlet opening l3 and it will be understood, of course, that the openings 1 and I3 are to be connected into the line which the valve is to control.

The bore 6 has a series of sections of gradually diminishing diameter beginning with the widest portion 14 at the inlet end 1 and continurower portion at H which latteris a'smooth bore and is adapted to receive a j resilient packing 18 which 'surijdundsthe s em '9 and abuts fat the to'p'ag'amst the underoiinner wallofthe body, 'therejbeing a suitably sloped should'e 19 for this I purpose surrounding "the aperture Ff Below-the resilientfpacking la I prefertopro- 'vlde a "metal gland-ring 20 against the under face of which isadapt'ed to' abut the upper end of a combined gland nutand stern bushing '2! which flatter is externally threaded; asshown; to cooperate withthe threads "at- IB so that thefbushing may be screwed into place and its seat shoulder 22 brought intotightcontact'with the oppos ing shoulder 23 onthe here of the body-. When the shoulders 22 and 123 are inabuttin'g-relationship the ring 20 pressed against 'thefpacking 18 in order to suitably, compressit for the sake q l ui h n ss'a ei n he Stem -The interior "of the "bushing 1 raise or low'er the valve disc l 0.

Belowthe disc 'I lithe stem i reduced in diameter to provide the step' 26' which'in'this embodiment oi the-valve controls the incoming fluid flow, the step 26 being adapted to cooperate with the ringlike seat 2-! which is provided -atfthe upper endof the 'sea'tmernber -2 8.-'-

- 'heupper urface'of the dis jmemberflfllis sloped as "indicated at 29 aiidthis sloping'surface is adapted to cooperate with the ring-like seat 30 on the under-faceofithe-bushingfmemher. When the stem -"9'is turned-so" a s:t'o"brir'ig the surface 29 againstthe seat 30' thevalveis in' itsfully opened position "and the contact between 29 and 30, the contactbetwen shoulders 22 and 23 and the packing at lfl serve to absolutelyprevent leakage around; the stem 9 through the stemaperture 8. .-In :the other.'direction" the surface 26 whenseated against the ring-like seat 21 completely: closes the ivalveto any= fluid fiowi', the valve being arranged ,toseat against the'directi'onof flow. V 1;"

The lower portion of the bushing 2 I is formed as an annular depending skirt or apron 3| which projects or extends past the outlet opening 32 in the wall of the body which opening is in alignment with the threaded portion l3 of the outlet. The bushing 2| is insertable. through the .screwed,.into;,position. whereits external shoultool, to ,form one :or more .bursJll preferably ls. ,It will bee-understood, of. course, that, the lock,-

.,side of fluid passage.

inlet opening I and the lower edge of the skirt ject through said valve stem aperture, a valve 3| is suitably slotted as at 33 for reception of stem bushing also insertable through said fluid a wrench by means of which the bushing may opening and having external threads, threads in be screwed tightly into place. After the bushthe bore into which said bushing is screwed, ing has been inserted and screwed into its proper 5 packing surrounding the stem between the end of position the skirt is tapped by means of a tool the bushing and the inner wall of the body, introduced through the opening l3 so as to pro threads on the valve stem and cooperating vide an'ppeningjiMiinalignmentyvithi' the openithifeadson the inside ofitlie'fbi'ishirig-i a seat piece ing 32=and thethreaded cdnhectionlSI-the also -inser table througlis'aid' opening and threadp gs 32 and 34 being threaded, as own, ed into the bore, a fluid opening intermediate the 01 t pti f W at I t rm a l king m m valve stem aperture and said first mentioned her or bushing 35 the head of which is suitably, ,fluide ppening, said fluid openings having pipe s p d t r iv a Wrench y m ans fw h connecting means, a skirt on the bushing which it can be we t pos W en its' eiztends' across said intermediate fluid opening, Proper position, as shown in Figure:l',-' the"inner: -l5 g'm k in alignment with the interd p j i t p n 3 in skirtand" mediate fluid opening, and a locking bushing inacts as a lock for preventing n 3 'i:. h isertable throughand threaded into said interbuehins 2| under the influence of any in mediate fiuid opening and adapted to project into m t wh may be d v p w t Stem the aligned hole in the skirt, said locking bushing 9 is rotated. It will be understood that the fluid containing a fl id passageway therethrough' fiewe u rd -t ueh th in e i of the lo k: 2; Avalve'comprising a bodywith an elongated ing bus =J't y bore having a fluid'opening at one end anda T e seat em 3 i te r u valvestem :ape'rtureat the opposite end,'a-va1ve \the inlet Opening 7 i m 21 19 member with a stem, said valve member and stem end i h-S i s er t reception .Of 2, being insertable through the saidfluid'opening it Q W n by mea of W i e ir with the stem adapted to project through said aperture, .9; valve-stem bushing also insertable e l through said, Yopening and having external o h Pd After -l 'il P Y t nfQm threads, threads ioni-the bore into which said e nsv t ki m a fl w Q zbushing isiscreweipacking surrounding the stem e wall 19 p b e me n he r r between the'aend: of therbushing and the inner wall of the body, opposed seating shoulders on the wall of the .bore: and on the bushing' x.said bushing: being adapted tobescrewed'into place 'to'compress the packing and to bring said shoulders =into. seating relationship, threads on the valve stem and 'cooperating'threads on the inside of thebushing, .a seat piece also insertable fthrough-said opening and threaded intoth'e bore, a fluid opening intermediate the valve s'tem'aper 'ture and said first mentioned fluidopening-' 2. skirt on the bushing,andaalo'c'king member v:irisertable through'tthe intermediate opening-and der 3l abuts.-against the shoulder 38 on the bore .catedw so asto project' into the adjacent :endof .a slot 36.; -Internally,. of course, the seat memher is provided with the channeL 39 through .35 Whichthefluid passes on its way to the outlet ing' member ;;need not, take e xactly the form illustrated although I prefer this form" For ex- 40 ple a'simple pinmight be employed at the From the foregoing, will a pare t that e of e Parts of improved mlve' Merm- .threadedlthrough the wall of the body to project openings .llandd3. 'Afte'rithe latter are con- :moves the vvalve from the line, which latter, .of

personneL- Inth-isway all danger of leakage fil' b Only through. one the -3 the its into-an aperture in the skirt whereby to prevent rotation of :the bushing under. theinfluence of nected .intothe line which the valvecontrolsz the rotation of the stemv j entire mechanism isabsolutely tamper-proof so i V J g i HOWARDIHAZEN-MCCHESNEY thatno nauthor zed person can alter ad ustments or;rep1ace. the packing unless he first' re- REFERENCES CITED,

- 7 The following references are of record in the course, should not be done except by authorized of this patent:. r s,

with its consequent hazards is practically -elimv :U s A Efi .inated. valve is ofysturdy construction, is :59 Number Name 7 highly efiicient in operation and can be easily and I 1 625,954

relatively "inexpensively manufactured: and 345,134

readily andysimply maintained, by properly au- 1,283,752

thorized persons. In fact; all that it is nec- 1,374,621

-essary-'to:.do' is to .remove-thevalve if .it needs 6 1,678,459-

attentionzand replace it with a new one, :the 1,753,833. oldlone being returned tothe shop for. repairs. 1,890,357- ?Barber.:- Dec.,6,.1932 I claim: o

:1. A valve device having-a body with a. cylin- 2,410,404 Buchanan Nov. 5, 1945 dri-caliboreJavalve stem aperture at one-endof r F R QN TE thebore, a fluid. opening at the opposite-endof Number p j y Datethe bore, a valve member with a stem, said valve ,4 9 i 7 Great Britain 1911 m mber-and stem, being insertable through the 3- 1 1, Fr n e; i 22, 1925 said fluid openingwith the stem adaptedto pro- 1 v i v r I i 

